(A) Below 2.2 Kelvin, helium is called super fluid
(R) Helium has abnormally low viscosity below 2.2 Kelvin

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. Both (A) and (R) are false

Answer

A